JP6625465B2 - Braking hinge mechanism - Google Patents

Description

  The present invention relates to a brake hinge mechanism that is simple in structure and can be reduced in size and is relatively inexpensive, and is suitable for a flip-up counter installed in a convenience store, a commercial dining kitchen, or a snack bar.

  In a convenience store or a commercial dining kitchen, a long counter including a cashier counter or the like is installed as disclosed in Japanese Patent Application Laid-Open No. 2005-211125, and a part of the counter is provided so that people can enter and leave the counter. Place a flip-up counter at In this flip-up counter, one edge of the movable top plate is rotatably connected to a fixed top plate via a hinge, and when passing through the counter, the movable top plate is flipped up until the movable top plate is fully opened, that is, turned 180 degrees. Move.

  When the flip-up counter does not always hold the movable top plate by hand at the time of flipping open / close, the movable top plate falls to the horizontal position by its own weight from the middle of the rotation, generating a large impact and noise. . For this reason, in Japanese Patent Application Laid-Open No. 2007-315013, the free fall of the top plate by its own weight is regulated by using a torque hinge having a predetermined rotation resistance. As a result, the movable top plate stops at the opening position at any angle when it is released, and does not fall freely to the horizontal position. The movable top plate may be pivoted downward from the half-open position opened by hand, and closed by hand when approaching the horizontal position. This hinge mechanism has a structure in which the hinge is located below the surface of the top plate, there is no gap between the movable top plate and the fixed top plate, and the movable top plate falls under its own weight and generates impact and noise. Not even.

  The hinge disclosed in Japanese Patent Application Laid-Open No. 2007-315013 has a beautiful appearance because the hinge is housed below the surface of the top plate and the space between the movable top plate and the fixed top plate is flat and close to each other. The opening angle is limited to 95 to 100 degrees, and the movable top plate, which is semi-open even at the maximum opening, is standing. The flip-up counter not only allows people to pass empty-handed, but also in convenience stores, in particular, it often passes with delivery luggage and in-store products, so it is said that the open movable top plate is standing up Luggage is likely to be caught on the movable top plate, causing accidents that damage or drop the luggage.

  The present applicant has already proposed Patent No. 5,745,963 as a hinge for a flip-up counter, and has further proposed Japanese Patent Application Laid-Open Nos. 2014-62396 and 2014-62595. The hinge disclosed in Japanese Patent Application Laid-Open No. 2014-62396 is similar to the hinge disclosed in Japanese Patent No. 5745963. Although two hinges are installed by cutting both sides of the movable and fixed top plates, relatively few parts are used and durability is low. Better. In addition, the hinge disclosed in Japanese Patent Application Laid-Open No. 2014-62595 hardly needs to cut into the counter part on the mounting side, as compared with the hinge disclosed in Japanese Patent No. It is possible to mount three or more units according to the torque required for opening and closing.

JP 2005-21125 A JP 2007-315013 A Japanese Patent No. 5745963 JP 2014-62396 A JP 2014-62595 A

  The hinges disclosed in Patent Nos. 5,745,963, JP-A-2014-62396, and JP-A-2014-62595 require two pivots to be installed in parallel with a certain distance therebetween, and this imposes some limitations on miniaturization. The location of the hinge is likely to be restricted. Also, by installing two pivots in parallel, the number of parts increases, the structure becomes relatively complicated, the manufacturing cost cannot be reduced, and it is difficult to manufacture at low cost.

  The present invention has been proposed in order to improve the above-mentioned problems with respect to a conventional hinge or the like for a flip-up counter and the like. It is an object of the present invention to provide an inexpensive brake hinge mechanism that prevents free fall by partially braking from an open position to a horizontal position, has a small number of components, has a relatively simple structure, and is inexpensive. Another object of the present invention is to provide a small brake hinge mechanism which can be easily attached to a relatively small lid such as an opening / closing lid of a small copying machine or a back lid of a piano. Another object of the present invention is to provide a brake hinge mechanism that can increase the number of attachments for a relatively heavy lid.

  The braking hinge mechanism according to the present invention has two leaf portions and a rotation block that can be rotated relative to each other, and the pivot penetrates through the barrel of both leaf portions and the through hole of the rotation block between the barrels. Then, the two leaf portions are rotatably integrated with each other, and the one-way wheel is stationary stored in the barrel of each leaf portion, while the plastic brake cylinder is stationary stored in the rotating block. When the first leaf portion is attached to the movable body and the second leaf portion is attached to the fixed body, and the movable body is turned from the horizontal fully closed position, the first leaf portion is in the upright semi-open position. When the movable body reaches a half-open position, the leaf portion stops. When the movable body continues to rotate, the rotating block brake-rotates to a full-open position.

  In the braking hinge mechanism according to the present invention, the turning block is a prism having a rectangular cross section having a ridge in the axial direction, and the lower wall of the turning block is such that the inner extending portions of both leaf portions are turned. Preferably it is circumferential so that it can be turned around the block. The bottom surfaces of both leaf portions are in contact with the side walls of the ridge portion in the fully closed position, and the inner side surfaces of both leaf portions are in contact with the side walls of the rotating block in the fully open position, thereby stopping both leaf portions. In this rotating block, it is preferable that a plastic brake cylinder is stored in a through hole provided coaxially with the barrel of each leaf portion, and the pivot is always braked by the brake cylinder.

In the braking hinge mechanism according to the present invention, the one-way wheels are housed in the barrels of both leaf portions, and the outer wheels are stopped on the inner peripheral wall of the barrel and stopped, and the small roller held by the retainer is provided on the pivot peripheral surface. by contacting the first leaf portion by barrel one-way wheel of the first leaf portion can be free rotated to the open direction and pivot closed direction of first leaf portion by barrel one-way wheel of the second leaf portion The pivot and the first leaf part rotate integrally with each other in the closing direction . In the flip-up counter, the first leaf portion is attached to the movable top plate, and the second leaf portion is attached to the fixed top plate, so that the movable top plate is freely rotated from the fully closed or fully open position to the half open position. On the other hand, the brake is rotated from the semi-open position to the fully open or fully closed position.

  The braking hinge mechanism according to the present invention uses a single pivot compared to conventional equivalent products, so the number of parts is reduced, the structure is simplified, and it can be manufactured relatively inexpensively. When the brake hinge mechanism of the present invention is attached to a flip-up counter, the movable top plate can be easily pulled up by free rotation in any of the opening and closing directions, while braking from the middle of rotation to the horizontal position. Accordingly, even if the hand is released from the movable top plate, the movable top plate does not fall freely, and noise and a finger jam caused by the fall of the movable top plate can be prevented.

  Since the brake hinge mechanism according to the present invention is entirely constituted by one pivot, it can be downsized compared to the case of two pivots, and can be compared with an opening / closing lid of a small copying machine or a back lid of a piano. It can also be attached to a very small lid. The braking hinge mechanism of the present invention does not need to cut the counter on the mounting side, and is relatively easy to mount.

  When the brake hinge mechanism according to the present invention is mounted on a relatively large flip-up counter, the number of mounting hinges can be increased along adjacent side surfaces of the movable top plate and the fixed top plate. It can be used even if it is relatively heavy and can be easily opened and closed by a weak woman. In the braking hinge mechanism of the present invention, in the horizontal fully closed position, the surfaces of the movable top plate and the fixed top plate are made to coincide with the height of the upper wall of the rotating block, and the portions protruding from both top plate surfaces are eliminated. It is also possible to arrange so that the delivery hinge and the goods in the store do not get caught on the brake hinge mechanism even if they slide on the surface of the top plate.

FIG. 3 is a perspective view showing a braking hinge mechanism according to the present invention. FIG. 2 is a plan view showing the braking hinge mechanism of FIG. 1. FIG. 2 is a side view illustrating the braking hinge mechanism of FIG. 1. FIG. 2 is an exploded perspective view showing the braking hinge mechanism of FIG. 1. It is the schematic side view which expands the one-way wheel stored statically in the barrel of both leaf parts, and shows a part in cross section. It is a partial perspective view showing a flip-up counter to which the hinge mechanism according to the present invention is applied. It is a principal part side view which shows the brake hinge mechanism of the fully closed position for demonstrating the opening / closing process of a 1st leaf part. It is a principal part side view which shows the brake hinge mechanism of a fully open position. It is a principal part side view of the brake hinge mechanism which has a movable top board and a fixed top board which are the same plane as the upper surface of a rotation block. FIG. 10 is a main part side view showing a fully opened brake hinge mechanism related to FIG. 9;

  The brake hinge mechanism 1 (FIG. 1) according to the present invention is installed in, for example, a flip-up counter 3 as shown in FIG. 6, in which case the movable body corresponds to the movable top plate 5 and the fixed body is fixed. It corresponds to the top plate 7. In the brake hinge mechanism 1, for example, the first leaf portion 8 is attached to the movable top plate 5, and the second leaf portion 10 is attached to the fixed top plate 7. Further, even when the first leaf portion 8 is attached to the fixed top plate 7 and the second leaf portion 10 is attached to the movable top plate 5, substantially the same function is provided except that the rotating block 12 first rotates.

  Although two brake hinge mechanisms 1 are normally mounted on the surfaces of the top plates 5 and 7 in the flip-up counter 3 at symmetric positions, if the load resistance is insufficient due to the weight and size of the movable top plate 5, the brake hinge mechanism 1 is used. Three, four (FIG. 6) or five or more mechanisms 1 may be attached at equal intervals. Although the brake hinge mechanism 1 partially protrudes upward from the top surface of the counter in FIG. 6, if the movable top plate 5 and the fixed top plate 7 are configured as shown in FIG. 9 and FIG. In the position, the braking hinge mechanism 1 and the top plate surface are flush.

  As shown in FIGS. 1 to 4, the brake hinge mechanism 1 has a first leaf portion 8, a second leaf portion 10, and a rotating block 12, and the pivot 14 is provided with a barrel 16 of the first leaf portion 8, The whole is integrated by penetrating through the through hole 18 of the rotation block 12 and the barrel 20 of the second leaf portion 10. The leaf portions 8 and 10 are generally L-shaped planes because a plurality of bolt holes 22 are provided in a rectangular flat portion 21 and the barrels 16 and 20 project upward and forward to the right of the flat portion. (See FIG. 2).

  The leaf portions 8 and 10 and the rotating block 12 are made of, for example, a zinc alloy that can be chrome-plated or appropriately colored, and the pivot 14 is made of stainless steel. The leaf portions 8 and 10 may be bolted to the surface of the movable top plate 5 or the fixed top plate 7, respectively (see FIG. 6). The leaf portions 8 and 10 usually have the same shape as illustrated in FIG. 2, and the flat portions 21 may have different sizes according to desired or intended uses.

  In the leaf portions 8 and 10, the barrels 16 or 20 projecting upward and forward are usually of the same lateral cylindrical shape, and are arranged so that their axial directions coincide during assembly (see FIG. 2). The cylindrical barrels 16 and 20 are provided with a through hole 23 (FIG. 4) having a partially convex portion on the inner peripheral wall, and a black POM (wear-resistant polyacetal) clutch case is provided in the through hole. The clutch case 24 is tightly housed and fixed, and an axial ridge 25 is formed on the inner peripheral wall of the clutch case in the circumferential direction. When a plurality of one-way wheels 26 are stored in the clutch case 24, axial grooves 28 are provided at equal circumferential intervals on the outer peripheral wall of each one-way wheel. , Each groove 28 fits with the ridge 25, and the one-way wheel stops in the barrel 16.

  The one-way wheel 26 is a device in which the inner wheel, that is, the pivot 14 can be rotated in one direction only by a plurality of small rollers 32 arranged around the inner wheel or the pivot 14. Although four one-way wheels 26 are accommodated in each barrel 16 in FIG. 4, the length of the clutch case 24 is determined to be one to three or five or more in accordance with the required withstand load. Just fine. When the braking hinge mechanism 1 does not require a large load-bearing capacity, the number of the one-way wheels 26 may be reduced and a plastic wheel (not shown) having substantially the same shape may be stored instead of the one-way wheel 26.

  When the pivot 14 rotates in the direction D in FIG. 5 or when the outer ring 34, that is, the barrel 16 rotates in the direction C, the one-way wheel 26 enters a locked state that restricts the relative rotation between the pivot 14 and the outer ring 34. On the other hand, when the pivot 14 rotates clockwise (counter-D direction) in FIG. 5 or the outer ring 34 rotates counterclockwise (counter-C direction) in FIG. 5, the one-way wheel 26 moves between the pivot 14 and the outer ring 34. It is in a free state allowing relative rotation.

  After the predetermined number of one-way wheels 26 are stored in the clutch case 24, the center modified hole of the washer 42 is fitted to both the modified ends 44 of the pivot 14, and both washers are crimped to the pivot ends. The diameter of the disk-shaped washer 42 is slightly larger than the outer diameter of the clutch case 24, and is substantially equal to the inner diameter of the circumferential groove at the barrel end. The washer 42 can be fixed to a snap ring such as an E-ring by forming a groove, welding or screwing.

  As shown in FIG. 7, the rotating block 12 is a rectangular column having a rectangular cross section having a ridge 46 below in the axial direction, and both side walls 48 and 50 need to be substantially vertical. When viewed from the side, the lower wall 51 (FIG. 8) of the pivot block 12 is circumferential so that the inner extensions 52, 54 of both leaf portions 8, 10 can pivot about the pivot block. The independent rotating block 12 is disposed between the barrels 16 and 20 and cooperates indirectly with the barrels 16 and 20 via the pivot 14. The rotating block 12 is provided with a through hole 18 through which the pivot 14 passes. The through hole 18 may have a cylindrical shape in which a plurality of cut grooves 53 (FIG. 7) are formed in the inner peripheral surface in the axial direction.

The inner extension portions 52, 54 of the leaf portions 8, 10 have a rectangular plane, and are located in the middle of the length direction of the leaf portions and adjacent to the barrels 16, 20. The end surfaces 55 (FIG. 8) of the inner extension portions 52 and 54 come into contact with the side walls of the ridge 46 when the movable top plate 5 is fully closed (FIG. 7) , and the side walls 48 and 50 when fully opened (FIG. 8). , The accurate turning of the leaf part 8 and the turning block 12 is controlled. As shown in FIG. 7, when the leaf portion 8 is half-turned, the inner extension portion 52 stops by contacting the surface of the inner extension portion 52 with the side wall 48 of the turning block 12. The stop 50 comes into contact with the surface of the inner extension 54, but the configuration of such a stop may itself be changed .

  The plastic braking cylinder 56 shown in FIG. 4 is a cylinder having a flange portion 58, the outer diameter of which is substantially equal to the diameter of the through-hole 18, and the inner diameter of which is larger than the diameter of the pivot 14 in a non-press-fit state. Slightly smaller. The outer peripheral surface of the brake cylinder 56 has a plurality of key protrusions 60 provided in the axial direction so as to correspond to the cut grooves 53. Since the brake cylinder 56 is made of, for example, POM, it can be used for a long time. When the brake cylinder 56 is stored in the through hole 18 of the rotating block 12, the key ridge 60 of the cylinder engages with the cut groove 53 of the through hole 18 to stand still, and the lower corner of the flange 58. When the insertion portion comes into close contact with the chamfered peripheral end of the through hole 18, the braking cylinder 56 is completely fitted into the through hole 18 except for the flange portion 58.

  The ring washer 62 is preferably made of POM similarly to the brake cylinder 56. The ring washer 62 may be formed with a cylindrical portion similarly to the braking cylinder 56, and this cylindrical portion may be usually very short. When the brake cylinder 56 is housed in the through hole 18, as shown in FIG. 2, the flange portion 58 is interposed between the rotary block 12 and the barrel 16, and the ring washer 62 is further connected to the rotary block 12 and the barrel 20. Between the rotating block 12 and the leaf portions 8 and 10, the frictional resistance during mutual rotation between the rotating block 12 and the leaf portions 8 and 10 is reduced.

  When the brake cylinder 56 is stowed in the through hole 18 and then the pivot 14 is press-fitted and passed through the brake cylinder 56, the pivot can be supported so as to be capable of braking rotation. The brake cylinder 56 has a key ridge 60 for preventing rotation on its outer peripheral wall, and such a detent may be a plurality of grooves in the peripheral wall formed on the one-way wheel 26, or its outer peripheral surface may be elliptical or rectangular. It is also possible to form a non-circular flat surface or the like, or to integrate them with an adhesive.

When the first leaf portion 8 is attached to the movable top plate 5 and the second leaf portion 10 is attached to the fixed top plate 7, the first leaf portion 8 freely rotates from fully closed to half open, and conversely from full open to half open. (See FIGS. 7 and 8). At this time, the free rotation means that the vehicle can freely rotate as in the related art without being braked. Regarding the first leaf portion 8, the direction F means free rotation, and the direction B means braking rotation with the rotation block 12 interposed . In FIG. 7, when the first leaf portion 8 at the time of closing is turned in the direction indicated by the arrow F on the left side , the first leaf portion rotates around the pivot 14 together with the outer ring 34 in the anti-C direction in FIG. 14 is stopped by the one-way wheel 26 of the second leaf portion 10, while, when the first leaf portion 8 is to be rotated in the direction B on the left side of FIG. The first leaf portion 8 is brake-rotated by pivoting together with the pivot 14 and rotating the brake within the brake cylinder 56 of the rotating block 12 at rest. When the first leaf portion 8 after opening is turned in the F direction on the right side in FIG. 7, the one-way wheel 26 of the second leaf portion 10 causes the pivot 14 to rotate together with the first leaf portion 8 and the rotating block 12, while the first leaf When the portion 8 is to be rotated in the B direction on the right side in FIG. 7, the pivot 14 stops, the first leaf portion 8 rotates in the B direction together with the rotation block 12, and the braking cylinder 56 of the rotation block is pivoted. The first leaf portion 8 is brake-rotated by turning around 14.

  Since the braking hinge mechanism 1 has a simple structure and can be miniaturized, it can be mounted not only on the flip-up counter 3 as shown in FIG. 6 but also on a lid of a heavy glass container or metal container which is easily broken. It may be attached to. In addition, it can be applied to a lid of an underground storage or a manhole, a hatchback of an automobile, or the like due to an increase in size.

  Next, the present invention will be described based on examples, but the present invention is not limited to the examples. The brake hinge mechanism 1 shown in FIG. 1 has a configuration in which the first leaf portion 8 is attached to the movable top plate 5 and the second leaf portion 10 is attached to the fixed top plate 7 in the flip-up counter 3 arranged on a long counter. In addition, the movable top plate 5 can be rotated to the full open state with respect to the fixed top plate 7, that is, about 180 degrees open (see FIG. 8). The first leaf portion 8 is freely rotated from the fully closed position to the semi-open position, and is further brake-rotated from the semi-open position to the fully open position, while being freely rotated from the fully open position to the semi-open position, and is further semi-opened. From above to the fully closed position.

  When assembling the brake hinge mechanism 1, the brake cylinder 56 (FIG. 4) is fitted into the through hole 18 of the turning block 12, and the ring washer 62 is arranged on the other end surface of the turning block 12. Is disposed between the cylindrical barrels 16 and 20 of the leaf portions 8 and 10, and then the pivot 14 is pressed into and passed through the brake cylinder 56. As a result, the pivot 14 protrudes into the through holes 23 of the barrels 16 and 20.

  Next, the clutch case 24 is inserted and fixed in the through holes 23 (FIG. 4) of the cylindrical barrels 16 and 20, and the four one-way wheels 26 are stored in the clutch case 24. An axial ridge 25 is formed on the inner peripheral wall of the clutch case 24, while axial grooves 28 are provided on the outer peripheral wall of each one-way wheel 26 at equal intervals in the circumferential direction. When housed in the case 24, each groove 28 fits with the ridge 25 and stops in the barrel 16, 20.

  The one-way wheel 26 is a device in which the large one is also called a one-way clutch, and the inner wheel, that is, the pivot 14 can be rotated only in one direction by a plurality of small rollers 32 arranged around the one-way clutch. The one-way wheel 26 disposed in the clutch case 24 of the barrels 16 and 20 has a short cylindrical shape as shown in FIG. 4, and has an inner diameter smaller than the diameter of the pivot 14 as schematically illustrated in FIG. It is slightly larger and its outer diameter is approximately equal to the inner diameter of the clutch case 24.

  The one-way wheel 26 has, for example, eight cylindrical small rollers 32 in contact with the periphery of the pivot 14 and an outer ring 34 having a relatively deep wedge-shaped cross section for accommodating each of the small rollers 32. The recess 36 has a shallow groove and a deep groove. In the one-way wheel 26, generally, 5 to 12 small rollers 32 may be arranged at equal intervals in the circumferential direction. In the one-way wheel 26, a part of the small roller 32 projects slightly inward from the inner peripheral surface of the cylindrical retainer 38. In the one-way wheel 26, an elastic member such as a leaf spring 40 or a coil spring urges each small roller 32 toward the shallow groove side of the concave portion 36.

  When the pivot 14 rotates in the direction D in FIG. 5 or when the outer ring 34, that is, the barrel 16 rotates in the direction C, each roller 32 rotates in the clockwise direction in FIG. . When the rollers 32 are pressed against the inner peripheral surface of the shallow groove portion and the outer peripheral surface of the pivot 14, the rollers 32 stop rotating and stop. At this time, torque is transmitted between the outer ring 34 and the pivot 14 via the roller 32, and the one-way wheel 26 enters a locked state in which the relative rotation between the pivot 14 and the outer ring 34 is restricted. On the other hand, when the pivot 14 rotates clockwise (counter D direction) in FIG. 5 or the outer ring 34 rotates counterclockwise (counter C direction) in FIG. 5, each roller 32 rotates counterclockwise in FIG. It moves in the direction of the deep groove while rotating. The gap between the inner peripheral surface of the deep groove portion and the outer peripheral surface of the pivot 14 is larger than the outer diameter of each roller 32 and is kept at that position by the leaf spring 40, so that each roller 32 continues to rotate. At this time, no torque is transmitted between the outer ring 34 and the pivot 14, and the one-way wheel 26 is in a free state in which the relative rotation between the pivot 14 and the outer ring 34 is allowed.

In the braking hinge mechanism 1, when the outer ring 34 of the one-way wheel 26 rotates in the counterclockwise direction in FIG. 5, that is, in the F direction on the left side in FIG. The small roller 32 also rotates counterclockwise , and the small roller moves away from the narrow inner wall surface against the elasticity of the leaf spring 40, so that the outer ring 34 idles around the pivot 14 and freely rotates to rotate the first leaf portion. 8 is easy to half open. Further, when the 7 Move left direction B to close the first leaf portion 8, the outer ring 34 rotates in the direction C in FIG. 5, the rotating small rollers 32 it clockwise in the recess 36. As a result, each small roller 32 bites into the narrow inner wall surface of the concave portion 36 by the elastic force of the elastic leaf spring 40, rotates the pivot 14 together with the outer ring 34, and suppresses the rotation of the pivot by the brake cylinder 56. The leaf part 8 rotates by braking.

  As shown in FIGS. 1 and 7, the rotating block 12 is a rectangular column having a rectangular cross section having a ridge 46 below in the axial direction, and both side walls 48 and 50 need to be substantially vertical. The rotating block 12 is disposed between the barrels 16 and 20 and cooperates indirectly with the barrels 16 and 20 via the pivot 14. The rotating block 12 is provided with a through hole 18 (FIG. 4) through which the pivot 14 passes. The through hole 18 has a cylindrical shape in which a plurality of cut grooves 53 (FIG. 7) are formed in the inner peripheral surface in the axial direction.

  First, an O-ring 30 (FIG. 4) is inserted into the clutch cases 24 of the barrels 16 and 20, and further four one-way wheels 26 are stored. Then, washers 42 (FIG. 4) are further fitted to both ends of the pivot, and After the center hole is fitted with the modified end 44 of the pivot 14, the pivot end is hit and crimped. The diameter of the disk-shaped washer 42 is slightly larger than the outer diameter of the clutch case 24, and is substantially equal to the inner diameter of the circumferential groove at the barrel end.

The full opening / closing operation of the first leaf portion 8 of the brake hinge mechanism 1 will be described with reference to FIGS. 7, the first leaf portion 8 freely rotates in the clockwise direction F as shown on the left side in FIG. 7, and rotates in the counterclockwise direction B together with the pivot 14 via the one-way wheel 26. Is turned by the rotation block 12 into a braking rotation. On the other hand, the opened first leaf portion 8 is freely rotated in the F direction on the right side in FIG. 7 together with the pivot 14 and the rotation block 12 by the one-way wheel 26 of the second leaf portion 10, and the pivot 14 stops in the B direction. As a result, by turning around the pivot 14 together with the rotation block 12, braking rotation is performed.

  In FIG. 7, the first leaf portion 8 is in the fully closed position. When the first leaf portion 8 is opened in the F direction on the left side of FIG. 7, the first leaf portion is freely rotated to a half-open position, that is, a 90-degree open position, so that the movable top plate can be opened lightly. At the time of this free rotation, even if the hand is released from the movable top plate 5, the movable top plate stops at that position. When the half-open position indicated by the dashed line in FIG. 7 is reached, the surface of the inner extension 52 of the first leaf portion 8 comes into contact with the left side wall 48 of the rotation block 12, and the rotation of the first leaf portion stops. The movable top plate 5 stops at an upright half-open position.

  If the first leaf portion 8 is further turned to the fully open position in FIG. 8, the first leaf portion is brake-rotated in the B direction on the right side in FIG. For this reason, even if the first leaf portion 8, that is, the movable top plate 5 is released from the semi-open position to the fully open position, or is suddenly pushed toward the fixed top plate 7, that is, the second leaf portion 10, The finger 8 rotates slowly, so that no finger jam occurs. When the first leaf portion 8 rotates by 180 degrees and reaches the fully open position in FIG. 8, the right side wall 50 of the rotating block 12 comes into contact with the surface of the inner extension portion 54 of the second leaf portion 10, and the movable top plate 5 Stops.

  On the other hand, when the first leaf portion 8 is pivoted from the fully open position in FIG. 8 to the fully closed position in FIG. At the same time, it freely rotates in the F direction with respect to the second leaf portion 10. At the time of this free rotation, even if the hand is released from the movable top plate 5, the movable top plate stops at that position. As a result, when the half-open position shown by the dashed line in FIG. 7 is reached, the side wall of the ridge portion 46 of the rotating block 12 abuts against the end face 55 of the inner extension portion 54 of the second leaf portion 10, and the rotating block Stops, and the movable top plate 5 stops at the upright half-open position.

  When the first leaf portion 8 is further turned backward from the one-dot chain line in FIG. 7 to the position indicated by the solid line in FIG. 7, the turning block 12 remains stationary, and the first leaf portion 8 is moved relative to the turning block 12. 7. The brake is turned in the B direction on the left side. Therefore, even if the first leaf portion 8, that is, the movable top 5 is released from the half-open position in FIG. 7 to the fully closed position in FIG. The finger rotates slowly so that no finger jams occur. When the first leaf portion 8 rotates by 180 degrees and reaches the fully closed position in FIG. 7, the end surface 55 of the inner extension portion 52 of the first leaf portion comes into contact with the side wall of the ridge portion 46 of the rotating block 12, The first leaf section 8 stops.

  Regarding the brake hinge mechanism 1 of the first embodiment, even if the second leaf portion 10 is attached to the movable top plate and the first leaf portion 8 is attached to the fixed top plate 7, this movable top plate is fixed to the fixed top plate 7. It can rotate to full open, that is, about 180 degrees open. At this time, the second leaf portion 10 freely rotates from the fully closed position to the half open position and further freely rotates from the full open position to the half open position, and brakes from the half open position to the full open position and further from the half open position to the fully closed position. I do.

  The full opening / closing operation of the second leaf portion 10 will be described with reference to FIGS. 7 and 8. In FIG. 7, the second leaf portion 10 is in the fully closed position. When the second leaf portion 10 is opened from the fully closed position, the second leaf portion pivots together with the pivot block 12 in the direction B on the left side of FIG. 7, and freely pivots to the half-open position, that is, the 90-degree open position. The second leaf portion can be opened lightly. When the second leaf portion 10 reaches the half-open position, the left side wall 48 of the rotation block 12 comes into contact with the surface of the inner extension portion 52 of the first leaf portion 8, and the rotation of the rotation block 12 stops. One leaf part stops at the half-open position.

  If the second leaf portion 10 is further turned to the fully open position, the second leaf portion is brake-rotated with respect to the rotation block 12 in the F direction on the right side in FIG. For this reason, since the second leaf portion 10 rotates slowly, a finger jam or the like does not occur. When the second leaf portion 10 turns by 180 degrees to reach the fully open position, the surface of the inner extension portion 54 of the second leaf portion 10 abuts on the right side wall 50 of the turning block 12, and the second leaf portion 10 stops. I do.

  On the other hand, when closing the second leaf portion 10 from the fully open position to the fully closed position in FIG. 7, the rotating block 12 is kept stationary, and the second leaf portion 10 It freely rotates in the right B direction. When the second leaf portion 10 reaches the semi-open position, the end face 55 of the inner extension portion 54 of the second leaf portion comes into contact with the side wall of the ridge portion 46 of the rotating block 12, and the second leaf portion 10 stops. Stand still in an upright, semi-open position. For this reason, the movable top plate 5 is gently reversely rotated, so that a finger jam or the like does not occur.

  When the second leaf portion 10 continues to reversely rotate from the semi-open position to the fully closed position in FIG. 7, the second leaf portion 10 is brake-rotated in the F direction on the left side in FIG. When the second leaf portion 10 reaches the fully closed position in FIG. 7, the side wall of the ridge portion 46 of the rotating block 12 comes into contact with the end face 55 of the inner extension portion 52 of the first leaf portion 8, and The rotation stops, and the second leaf portion 10 stops at the horizontal fully closed position.

  The brake hinge mechanism 66 shown in FIGS. 9 and 10 has the same structure as the brake hinge mechanism 1 of the first embodiment, but the upper wall of the rotating block 68 has the movable top plate 70 and the movable top plate 70 in the fully closed position of FIG. The height of the surface of the fixed top plate 72 coincides with the height. Therefore, the first and second leaf portions 74 and 76 are bolted to the back surface of the movable top plate 70 or the fixed top plate 72. In practice, the upper wall of the rotating block 68, the surfaces of the movable top plate 70 and the fixed top plate 72 can be lowered to the dashed line 78 in FIG. 9, and this height can be made as low as possible. preferable.

  In the braking hinge mechanism 66, when the upper wall of the rotating block 68 is made to have the same height as the surfaces of the movable top plate 70 and the fixed top plate 72, there is no portion protruding from the surfaces of the top plates 70 and 72. As a result, when the delivery luggage or merchandise in the store is slid and moved on the surfaces of the top plates 70 and 72, these items are not caught by the rotation block 68 of the brake hinge mechanism 66, so that smooth transportation is possible. It is possible to do.

  When the first leaf portion 74 is pivoted upward, the brake hinge mechanism 66 shown in FIG. 9 can be opened until the surface of the movable top plate 70 comes into contact with the inclined surface 80 of the fixed top plate 72 beyond the semi-open position. (See FIG. 10). If the inclination angle of the inclined surface 80 is made smaller, the turning angle of the first leaf portion 74 can be further increased, but the gap between the rotating block 68 and the end surface of the fixed top plate 72 becomes larger.

Reference Signs List 1 brake hinge mechanism 3 flip-up counter 5 movable top plate 7 fixed top plate 8 first leaf portion 10 second leaf portion 12 rotating block 14 pivot 16 barrel of first leaf portion 20 barrel of second leaf portion 26 one-way wheel 46 Protrusions of rotating block 56 Plastic brake cylinder 62 Ring washer

Claims (5)

It has two leaf parts , a rotating block , a pivot, a one-way wheel, and a plastic braking cylinder that can pivot with respect to each other, and the pivot penetrates through the barrel of both leaf parts and the through hole of the rotating block between both barrels. By doing so, the two leaf parts are rotatably integrated with each other, and the one-way wheel in which the small rollers arranged in the periphery contact the peripheral surface of the pivot is stored in the barrel of each leaf part, while the horizontal column-shaped rotation by stationary housing the plastic braking cylindrical body which is pressed passes the Oite pivot block, when the first leaf portion to pivot from the full closed position of the horizontal, the first leaf portion contacts a portion of the pivot block semi-open and free rotation by one-way wheel to a position, continuing with further pivoting of the first leaf portion, the first leaf portion in the braking cylinder in the block rotates together with the pivot block to Braking hinge mechanism for braking rotation to the full open position I. The rotating block is a rectangular column having a rectangular cross section having a ridge in the axial direction, and the lower wall of the rotating block is circular so that the inner extensions of both leaf portions can rotate around the rotating block. a circumferential, to come in contact with the side wall of the ridge portion of the pivot block in all the closed position the end face of the inner extension portion of both the leaf portion and the side surface of the inner extension portion of both the leaf portion rotating at fully open position controlling hinge mechanism according to claim 1, wherein the stopping both the leaf portion to come in contact with the side wall of the block. In the rotating block, a plastic braking cylinder is stably stored in a through hole provided coaxially with the barrels of both leaf portions, and the inner diameter of the cylinder is slightly smaller than the diameter of the pivot in a non-pressed state. 2. The brake hinge mechanism according to claim 1, wherein the pivot is always pressurized and rotated by the brake cylinder by press-fitting the pivot through the brake cylinder. By storing the one-way wheel in the barrel of both leaf parts, stopping the outer ring on the barrel inner peripheral wall and stopping, and the spring biased small roller held by the retainer contacts the pivot peripheral surface. the first leaf portion by barrel one-way wheel of the first leaf portion can be free rotated to the open direction and pivot the free rotation to the closure direction of first leaf portion by barrel one-way wheel of the second leaf portion controlling hinge mechanism can Ru claim 1.   In the flip-up counter, the first leaf portion is attached to the movable top plate, and the second leaf portion is attached to the fixed top plate, whereby the movable top plate is freely rotated from the fully closed or fully open position to the half open position. 2. The brake hinge mechanism according to claim 1, wherein the brake is rotated from a semi-open position to a fully open or fully closed position.

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